Center-bearing



A. A. GAGARIN.

CENTER BEARING.

APPLICATION FILED NOV. 6. 919.

1,384, 1 87. Patented July 12, 1921.

g pz may "r "a dismal? the ANDREV] A. GAGABIN, OE DETROET, llElCZ-IIG-AN, ASSIGNOR TO THE GEAR GRINDING LWEACEINE COIEPANY, 03. DETROIT, IEXCE Z "All, CJREE'GIL "SIGN OF TJL'KCHIGAN.

CENTER-BEARING.

-, w q .l ,eisu c i a. specification of Application filed November 6, 1919.

lo it :nown that 1, ANDREW A. GAGARIN,

a citizen of the United States of America, residing at Detroit in the county of Wayne nd State of lvlichigan, have invented ceri new and useful improvements in Cen- To all whom it may concern bid terdlearings. of which the following a speciication, reference being had therein to the accompanying drawings.

The invention relates to that class of mechanical operations in which the work to be machined, ground, or otherwise fashioned, is mounted upon centers. it has long been the practice to Gll'lPiOj. centers or supporting the worlr. these usually engaging center bearings formed directly in the ends of the blanks. Lherc are, however, many places where i is impossible to form direct center r ngs and wl ere it is necessary to provide auxiliary bearing members. As a specific sin e shafts in transmission gears cs formed with reces ed ends for recei ing the end or the t. The depth of the recess is i it would be inconvenient to form a A in nA n on of a relatively large number s ;or carrying on the work. Further- 1 L been found that the plugs are ort-livec as they wear rapidly in use so I; their accuracy.

p 7 the operation and to economize time a cost by providing a center hearing which may be quiclrlv engaged and disenpaged from the blank hand and which at the same time has a high degree of accuracy.

is a further object to obtain an anti-friction bearing which will perform its work with slight wear and which also diminishes the wear upon the supporting centers. The invention therefore comprises the novel construction as hereinafter Set forth.

Letters Patent. Patented July 12,

1 11 the drawings:

figure 1 is a sectional elevation showing a work blank with my improved center bearing engaged therewith and supported on the stationary center;

Fig. 2 is a longitudinal section through the bearing.

While my improvement is applicable to various kinds of work, have described 0111 the one specific application above referred to. i is a spline shaft having formed on one end then f the pinion or gear wheel ll and the recess for telescopically receiving a coipcrat= shaft. is a center bearing at the opposite end of the shaft and E and E are centers for supporting the shaft while being ground or otherwise operated upon.

lily impi v'd bearing comprises a ball. or other an i-fricti on roller bearing F which is mounted on a plu fitting the recess C with suflicient clea ice to permit of its beand disengaged by hand. The

comprises the balls F. a rethcrefor ant an end thrust race retainer H is in the form of rical shell surrounding the balls but opposite each ball to permit the The end thrust race member i is of a slightly conical form and is provided wit 1 a shank J fitting within the plug G so as to be accurately centered therewith.

There is also preferably groove K in the race member for receiving an inwardly extending portion L of the retainer, there holding said retainer from disengagement while permitting independent rotation thereof.

ll hen the plug is placed in the recess C, ts outer end will be in a position to engage h :enter l5, the conical surface of which i oer. ainst the balls and press radially outward thereon. This radial thrust is taken up by the cylindrical surface of the recess C. while the end thrust is carried through the race member 1 into the plug. The inner end of this plug iits against the bottom or inner end of the recess and there fore carries the end pressure directly into the shaft. Thus, in operation, the accurate centering is obtained by the spa-sing of the balls, which being of exactly the same diameter will hold the cylindrical surface C exactly co-axial with the conical face of the center E. lVhile the work is revolving the balls roll about the center E, cylindrical surface C and race member I, while the retainer H revolves with the balls without material restraining pressure thereon. Therefore, the work is performed with very little wear upon the centers and none upon the plug. The wear upon the balls is so slight that they may be used for many operations, but whenever necessary, they can be quickly removed and replaced by new balls.

hat I claim as my invention is:

l. The combination with a supporting center, of an anti-friction bearing therefor, the rolling members of which are adapted to contact with the work to hold the same in co-axial relation to said center.

2. The combination with a supporting center, of an anti-friction roller bearing, the rolling members of which have a radial and indirect end thrust engagement with said center, and a radial and end thrust engagement with the work to be supported thereon.

3. The combination with a supporting center, of an anti-friction roller bearing, the rolling members of which have a radial and end thrust bearing upon said center, and a radial bearing upon a trued surface of the work, and means for indirectly transmitting the end thrust of said bearing into the work.

4. The combination with a supporting cent r, of an anti-friction roller bearing, the rolling members of which have a radial and end thrust engagement therewith, and a radial thrust engagement with a trued 5. The combination with a supporting center, of an antifriction roller bearing for engaging the same, a member on which said anti-friction bearing is mounted loosely fitting a recess in the work, said member providing direct contact of the rollers with a trued surface of the work. 7

6. The combination with a supporting enter, of a plug member for loosely en- 'aging a recess in the work, and a roller earing mounted on said plug member having the rolls thereof interposed between said center and a trued surface of the work.

7. The combination with a supporting center, of a plug for loosely engaging a central recess in the work, said plug being provided with an end thrust recess member, and rollers engaging said end thrust race memher and said center and also engaging a trued. surface of the work.

8-. The combination with a supporting center, of a plug member for loosely fitting a central recess in the work, an end thrust race member in fixed relation to said plug, a series of rollers, a retainer for said rollers revolubly engaging said plug and holding said rollers in contacting relationto said center and end thrust bearing, said retainer beingcut away to provide radial contact of said rollers with a trued surface of the work.

In testimony whereof I affix my signa ture.

ANDREWV A. GAGARIN. 

